PLECOPTERA OF NORTH AMERICA 221 



Type, male, No. 11360, Winnipeg, June 17 (Banks Col- 

 lection, Museum of Comparative Zoology, Cambridge, 



Mass.). 



Nemoura punctipennis Claassen. 



(Plate 32, fig. 3; plate 39, figs. 18-20.) 

 1923. Nemoura punctipennis Claassen, Can. Ent., 55:291. 



Length to tip of wings, male, 6.5 mm. ; female, 6.5-7.5 

 mm. Expanse, male, 11.5 mm.; female, 11.5-13 mm. 



General color black with banded legs and spotted wings. 



Head black, wider than prothorax, feebly pilose; a de- 

 pression in the ocellar triangle ; hind ocelli a little closer 

 to eyes than to each other; eyes large. 



Prothorax blackish, wider than long, not narrowed be- 

 hind; surface irregular but not very rugose. Meso and 

 metathorax blackish. Legs dark brown, femora with a 

 light transverse band near the tip, especially pronounced 

 in the hind femora; first tarsal segment long, about as 

 long as two and three together, second tarsal segment a 

 little shorter than the third. Wings with heavy brown 

 veins ; inf uscated along the costal margin between costa 

 and radius, a transverse band at the cord and a lighter 

 band beyond the cord ; anal area of hind wings large. 



Abdomen yellowish brown except the tip which is 

 darkly chitinized (8, 9 and 10 in the male, and 9 and 10 

 in the female). 



Male. Subanal lobes small, rounded behind and un- 

 modified. Supra-anal process recurved over the abdomen, 

 heavily chitinized underneath, broad at the base, tapering 

 to a slender point, cleft in the middle with a membrane 

 on top and two rearward pointing spines behind. Cerci 

 composed of one chitinized segment. Subgenital plate 

 short, pointed and without ventral lobe at the base ; tenth 

 tergite depressed in the middle with a raised knob on each 

 side. 



Female. Seventh sternite produced posteriorly over 

 eighth sternite which is unmodified ; genital opening not 

 guarded by distinct valves. 



Distribution. — Holotype, male, allotype, female, June 

 12-22, 1901, Adirondack Mts., Axton, N. Y. (A. D. Mc- 

 Gillivray and C. O. Houghton, in Cornell University Col- 

 lection) ; two females, June 12-22, 1901, Adirondack Mts., 

 Axton, N. Y. (same collectors) ; one female, Old Forge, 

 N. Y., June 26, 1905 ; one female, Tim Pond Plantation, 

 Me., June 22. 



